Given the Object-Oriented nature of the MooTools framework, code repetition is something that is long forgotten (or should be) in the scripts your write. With the avoidance of code repetition comes code reusability, which results in your website being easier to read, extend and maintain, and your scripts smaller in size.

At this point there’s no doubt in anyone’s mind that DRY is a principle we should stick to. However, let’s examine how to achieve this in the right way.

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